derek.holloway
7502bf64a4
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127 lines
3.2 KiB
LLVM
127 lines
3.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i64 @t0(i64 %x) {
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; CHECK-LABEL: @t0(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = lshr i64 %x, 63
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @t0_exact(i64 %x) {
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; CHECK-LABEL: @t0_exact(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr exact i64 [[X:%.*]], 63
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = lshr exact i64 %x, 63
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @t2(i64 %x) {
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; CHECK-LABEL: @t2(
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; CHECK-NEXT: [[T0_NEG:%.*]] = lshr i64 [[X:%.*]], 63
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = ashr i64 %x, 63
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @t3_exact(i64 %x) {
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; CHECK-LABEL: @t3_exact(
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; CHECK-NEXT: [[T0_NEG:%.*]] = lshr exact i64 [[X:%.*]], 63
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = ashr exact i64 %x, 63
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define <2 x i64> @t4(<2 x i64> %x) {
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; CHECK-LABEL: @t4(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr <2 x i64> [[X:%.*]], splat (i64 63)
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; CHECK-NEXT: ret <2 x i64> [[T0_NEG]]
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;
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%t0 = lshr <2 x i64> %x, <i64 63, i64 63>
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%r = sub <2 x i64> zeroinitializer, %t0
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ret <2 x i64> %r
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}
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define <2 x i64> @t5(<2 x i64> %x) {
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; CHECK-LABEL: @t5(
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; CHECK-NEXT: [[T0:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 63, i64 undef>
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; CHECK-NEXT: [[R:%.*]] = sub <2 x i64> <i64 0, i64 undef>, [[T0]]
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; CHECK-NEXT: ret <2 x i64> [[R]]
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;
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%t0 = lshr <2 x i64> %x, <i64 63, i64 undef>
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%r = sub <2 x i64> <i64 0, i64 undef>, %t0
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ret <2 x i64> %r
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}
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declare void @use64(i64)
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declare void @use32(i64)
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define i64 @t6(i64 %x) {
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; CHECK-LABEL: @t6(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X]], 63
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; CHECK-NEXT: call void @use64(i64 [[T0]])
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = lshr i64 %x, 63
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call void @use64(i64 %t0)
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @n7(i64 %x) {
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; CHECK-LABEL: @n7(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X]], 63
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; CHECK-NEXT: call void @use32(i64 [[T0]])
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = lshr i64 %x, 63
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call void @use32(i64 %t0)
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @n8(i64 %x) {
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; CHECK-LABEL: @n8(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X]], 63
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; CHECK-NEXT: call void @use64(i64 [[T0]])
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; CHECK-NEXT: call void @use32(i64 [[T0]])
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; CHECK-NEXT: ret i64 [[T0_NEG]]
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;
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%t0 = lshr i64 %x, 63
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call void @use64(i64 %t0)
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call void @use32(i64 %t0)
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @n9(i64 %x) {
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; CHECK-LABEL: @n9(
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 62
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; CHECK-NEXT: [[R:%.*]] = sub nsw i64 0, [[T0]]
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; CHECK-NEXT: ret i64 [[R]]
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;
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%t0 = lshr i64 %x, 62
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%r = sub i64 0, %t0
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ret i64 %r
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}
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define i64 @n10(i64 %x) {
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; CHECK-LABEL: @n10(
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; CHECK-NEXT: [[ISNOTNEG:%.*]] = icmp sgt i64 [[X:%.*]], -1
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; CHECK-NEXT: [[R:%.*]] = zext i1 [[ISNOTNEG]] to i64
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; CHECK-NEXT: ret i64 [[R]]
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;
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%t0 = lshr i64 %x, 63
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%r = sub i64 1, %t0
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ret i64 %r
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}
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